Hi all,
I am working on making a switched mode arc welding machine with maximum 150A current and 30-40V. I have done most of the circuitry but the problem I face is the output current control. I do not want to use the bulky old linear type inductor, so what can be the solution?
I have seen in some SMPS welding machine (in schematics), current is controlled with a small ferrite core inductor. I tried to find out the calculation and procedure, but could not find out from any book or internet the required procedure for controlling output current through ferrite core inductor.
I require to control the output current to control the inrush current and also to use different type of welding rod with controlled current from 75A to 150A.
In some discussion on some forums, I found the idea of controlling output current through hall effect sensor. But nowhere it is discussed in detail. So, no concrete idea could have been formulated.
Help in this regard will be appreciated.